CAJ | 학술논문

利用均匀线阵，本文提出了一种有效的相关噪声下宽带相干信号DOA估计算法．首先，在各个频率点，利用空间差分技术消除色噪声分量，并通过平方操作构造新矩阵；然后，通过聚焦操作得到通用的协方差矩阵；最后，通过使用传播算法估计得到宽带相干信号的DOA．算法能够分辨的相干组中相干信号的个数可以是奇数或是偶数．仿真结果验证了算法的有效性和性能．
이용균균선진，본문제출료일충유효적상관조성하관대상간신호DOA고계산법．수선，재각개빈솔점，이용공간차분기술소제색조성분량，병통과평방조작구조신구진；연후，통과취초조작득도통용적협방차구진；최후，통과사용전파산법고계득도관대상간신호적DOA．산법능구분변적상간조중상간신호적개수가이시기수혹시우수．방진결과험증료산법적유효성화성능．
In this paper ,we propose an efficient direction of arrival estimation method for wideband coherent signals in the presence of correlated noise with uniform linear array .Firstly ,the component of correlated noise is eliminated by using the spatial differencing technique and then a new matrix is constructed by performing the squaring operation at each frequency bin .Afterwards , a universal covariance matrix is obtained by performing a focusing operation .Finally ,the coherent signals are resolved by applying the propagator method .The signal number in a coherent group resolved by the proposed method can be even or odd .Simulation re-sults demonstrate the effectiveness and performance of the proposed method .